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1.发明授权
公开(公告)号：US4771439A
公开(公告)日：1988-09-13
申请号：US49048
申请日：1987-05-12
申请人： Takeshi Okazaki , Toshitaka Tsuda , Shin-ichi Maki , Kiichi Matsuda , Hirohisa Gambe , Hirokazu Fukui , Toshi Ikezawa
发明人： Takeshi Okazaki , Toshitaka Tsuda , Shin-ichi Maki , Kiichi Matsuda , Hirohisa Gambe , Hirokazu Fukui , Toshi Ikezawa
CPC分类号： H03M7/3044 , G06T9/004
摘要： A differential coding circuit including a subtracter, a quantizer for quantizing a differential signal from the subtracter, and a predicted signal generating circuit for generating a predicted signal on the basis of a quantized differential signal from the quantizer. The subtracter subtracts the quantized differential signal of the quantizer and the predicted signal from the sampled input signal. The critical path of the circuit is shortened, therefore the operation speed of the differential coding circuit increases.
摘要翻译： 一种差分编码电路，包括减法器，用于量化来自减法器的差分信号的量化器，以及预测信号产生电路，用于根据来自量化器的量化差分信号产生预测信号。 减法器从采样输入信号中减去量化器的量化差分信号和预测信号。 电路的关键路径缩短，因此差分编码电路的运行速度增加。
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公开(公告)号：US4160243A
公开(公告)日：1979-07-03
申请号：US925787
申请日：1978-07-18
申请人： Takao Moriya , Masao Yamasawa , Hirohisa Gambe
发明人： Takao Moriya , Masao Yamasawa , Hirohisa Gambe
摘要： An asynchronous signal processing circuit device having an A-D converter and a D-A converter in which a single ladder voltage generating circuit is commonly or jointly used by changing over a multiplexer during both the A-D and the D-A conversion processing. The asynchronous signal processing circuit device according to the present invention further comprises an interrupt signal generating circuit which produces an inhibit signal so as to provide a predetermined inhibit period during which the interruption by the second signal processing circuit to the first signal processing circuit is inhibited, thus preventing a misoperation of the asynchronous signal processing circuit device at the time of switching over the converters.
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